Compressor installation

A compressor is a passive fluid mechanical device that converts low-pressure gas into high-pressure gas, and is the heart of a refrigeration system. It sucks in low-temperature and low-pressure refrigerant gas from the suction pipe, drives the piston to compress it through the operation of the motor, and discharges high-temperature and high-pressure refrigerant gas to the exhaust pipe, providing power for the refrigeration cycle, thus achieving a refrigeration cycle of compression, condensation (heat release), expansion, and evaporation (heat absorption).

A linear compressor uses the principle of magnetic levitation and a spiral ring fluid dynamics structure to compress gas and provide power for refrigeration.

Compressors are divided into piston compressors, screw compressors, centrifugal compressors, linear compressors, etc. A piston compressor generally consists of a housing, an electric motor, a cylinder body, a piston, control equipment (starter and thermal protector), and a cooling system. There are three cooling methods: oil cooling, air cooling, and natural cooling. A linear compressor has no shaft, cylinder body, seal, and heat dissipation structure.

The compressors of general household refrigerators and air conditioners use single-phase AC power as their power source, and their structural principles are basically the same, but the refrigerants used in the two are different.

Types of compressors in Xining:

The compressor is regarded as the heart of the refrigeration system, and the specialized term that better represents the characteristics of the compressor is called the "vapor pump". The actual responsibility of the compressor is to increase the pressure and raise the suction pressure state to the discharge pressure state.

Compression ratio is a technical representation of pressure difference, which means a certain pressure on the high-pressure side divided by a certain pressure on the low-pressure side. The calculation of compression ratio must use a certain pressure value. To avoid negative values in the compression ratio calculation, it is necessary to use a certain pressure instead of gauge pressure when calculating the pressure ratio. It is meaningful to use a certain pressure value to make the calculated compression ratio positive.

There are five types of compressors used in the refrigeration and air conditioning industry: reciprocating, screw, rotary, vortex, and centrifugal. Among them, reciprocating is the most commonly used compressor in small and medium-sized commercial refrigeration systems. Screw compressors are mainly used in large commercial and industrial systems. Rotary compressors and scroll compressors are mainly used in household and small capacity commercial air conditioning units, while centrifugal compressors are widely used in air conditioning systems for large buildings.

Various reciprocating compressors are generally classified according to the form of the compressor housing and the setting of the driving mechanism. According to the shell form, there are open and closed semi closed compressors. Closed type refers to the entire compressor being housed within a single casing.